American mountain-ash
Sorbus americana, Hardiness : Zone 3
Other names
Rowan
Category
Ornamental tree
Availability
30cm high, in pot 10.00$
60cm high, in three gallons pot 25.00$
150cm high, in pot 45.00$
200cm high, in pot 80.00$
10 x 30cm high, in pot 80.00$
20 x 30cm high, in pot 140.00$
Features
Height X Width
9.0m X 6.0m
Foliage
dark yellow green above and paler beneath. In autumn they turn a clear yellow
Flowering
-
Edible parts description
Berry-like pome, globular, one-quarter of an inch across, bright red, borne in cymous clusters.
Resistances
General resistance
Sun exposure
Full sun, Mid-shade
Soil type
-
Edible parts
-
Pollination
-
Images
Click to see full size
Description, from Wikipedia

Sorbus americana is a relatively small tree, reaching 12 metres (40 ft) in height. The American mountain-ash attains its largest specimens on the northern shores of Lake Huron and Lake Superior.

It resembles the European mountain-ash, Sorbus aucuparia.

Bark
Light gray, smooth, surface scaly. Branchlets downy at first, later become smooth, brown tinged with red, lenticular, finally they become darker and the papery outer layer becomes easily separable.
Wood
Pale brown; light, soft, close-grained but weak. Specific gravity, 0.5451; weight of cu. ft., 33.97 lbs.
Winter buds
Dark red, acute, one-fourth to three-quarters of an inch long. Inner scales are very tomentose and enlarge with the growing shoot.
Leaves
Alternate, compound, odd-pinnate, 6 to 10 inches (15 to 25 cm) long, with slender, grooved, dark green or red petiole. Leaflets 13 to 17, lanceolate or long oval, two to three inches long, one-half to two-thirds broad, unequally wedge-shaped or rounded at base, serrate, acuminate, sessile, the terminal one sometimes borne on a stalk half an inch long, feather-veined, midrib prominent beneath, grooved above. They come out of the bud downy, conduplicate; when full grown are smooth, dark yellow green above and paler beneath. In autumn they turn a clear yellow. Stipules leaf-like, caducous.
Flowers
May, June, after the leaves are full grown. Perfect, white, one-eighth of an inch across, borne in flat compound cymes three or four inches across. Bracts and bractlets acute, minute, caducous.
Calyx
Urn-shaped, hairy, five-lobed; lobes, short, acute, imbricate in bud.
Corolla
Petals five, creamy white, orbicular, contracted into short claws, inserted on calyx, imbricate in bud.
Stamens
Twenty to thirty, inserted on calyx tube; filaments thread-like; anthers introrse, two-celled; cells opening longitudinally.
Pistil
Two to three carpels inserted in the bottom of the calyx tube and united into an inferior ovary. Styles two to three; stigmas capitate; ovules two in each cell.
Fruit
Berry-like pome, globular, one-quarter of an inch across, bright red, borne in cymous clusters. Ripens in October and remains on the tree all winter. Flesh thin and sour, charged with malic acid; seeds light brown, oblong, compressed; cotyledons fleshy.